Hole forming mechanism for bookbinding machine



' Y JoHNQwr-mom Y; |.1l Il! l Nm? TIL... llllllllllllllllcl...

HOLE FORMING MECHANISM FOR BOOKBINDING MACHNE Oct. 8, 1968 Filed March14, 1966 ATroRNEY OC- 8, 1968 .1. o. wHlTcoMB 3,404,537

HOLE FORMING MECHANISM FOR BOOKBINDING MACHINE Filed March 14, 1966 9shexsrsheet 2 INVENTOR JDHN QWHITCOMB ATTORNEY Oct. 8, 1968 1.0.wHlTcoMB 3,404,587

HOLE FORMING MECHANISM FOR BOOKBINDING MACHINE 9 Sheets-Sheet 3 FiledMar'Ch 14, 1966 JOHN QWHITCOMB II |l|||||| ||li1|||ilII|||| ATTORNEYOct. 8, 1968 J. o. wHlTcoMB 3,404,587

HOLE FORMING MECHANlSM FOR BOOKBINDING MACHINE Filed March 14, 1966 9Sheets-Sheet 4 Erg 4.'.

INVENTOR JOHN O WHITCOME:

ATTURNEY Oct. 8, 1968 J. o. WI-HTCOMB 3,404,587

HOLE FORMING MECHANISM FOR BOOKBINDING MACHINE 9 Sheets-Sheet .5

Filed March 14, 1966 JOHN O.\NH|TCOMB .mllnwmun ATTORNEY Oct. 8, 1968.1. o. wHlTcoMB 3,404,587

HOLE FORMING MECHANISM FOR BOOKBINDING MACHINE 9 Sheets-Sheet 6 FiledMarch 14, 1966 INVENTOR JOHN QWHITCOMB ATTORNEY Oct. 8, 1968 J. o.wHlTcoMB 3,404,587

HOLE FORMING MECHANISM FOR BOOKBINDING MACHINE 9 Sheets-Sheet 7 FiledMarch 14, 1966 Nmnlm INVENTOR JOHN OWHITCOMB ATTORNEY Oct. s, 196s o.WHWCOMB 3,404,587

HOLE FORMING MECHANlSM FOR BOOKBINDING MACHINE Filed March 14, 1966 9Sheets-Sheet 8 INVENT OR JOHN QwHrrcoM ATTORNEY Oct. 8, 1968 J. o.WHITCOMB 3,404,587

HOLE FORMING MECHANISM FOR BOOKBINDING MACHINE 9 Sheets-Sheet 9 FiledMarch 14, 1966 :Er-51D.

INVENTOR ATTORNEY JOHN O.WHITCOME United States Patent O 3,404,587 HOLEFORMING `MECHANISM FOR BOOKBINDING MACHINE John O. Whitcomb,Mechanicsburg, Pa., assignor to Hickok Manufacturing Company,Harrisburg, Pa., a corporation ofPennsylvania Filed Mar. 14, 1966, Ser.No. 534,084 Claims. (Cl. 77--22) ABSTRACT OF THE DISCLOSURE Theapparatus drills holes in such articles as stenographers notebooks forthe threading of a spiral binder therethrough. Two aligned series ofdrills are provided with the openings of each series spaced apart adistance twice the distance of the openings in the book. An undrilledbook is fed to the `lirst series or station and openings are drilledtherein whereupon such book is advanced to the second station or seriesfor the drilling of the remaining openings in the book while a new bookis fed to the first station or series.

This invention relates to a hole forming mechanism for bookbindingmachines, and has .particular reference to the formation of openings inone end of looseleaf books, such as stenographers notebooks, wherein awire coil is spun through the openings formed with the machine.

In the making of books, such as stenographers notebooks, it is thecommon practice to punch the openings for receiving the wire coilbinder. This is feasible provided the thickness of the book is quitelimited, it being impossible to punch openings through a book ofsubstantial thickness. Since it is becoming more and more the commonpractice to make books of this type substantially thicker than can bepunched, it is necessary to divide the book, for example, into twoparts, punch the openings in each part of the book, then reassemble theparts of the book for the threading of the coil binders through theopenings. Obviously, this clearly slows down the rate of production ofthe books, two or more punching operations being required, and since itis diiiicult to accurately punch and assemble the parts of the books,the openings sometimes are not in proper alignment with each other,

An important object of the present invention is to provide an apparatusfor drillingthe openings in books of the type referred to wherein booksof almost any thickness can be efficiently drilled for the reception ofthe coil binders.

A further object is to provide such a machine wherein, because of themechanical nature of the apparatus, open ings spaced apart a distancetwice the distance between the openings in the iinished book, aredrilled through a book at one Work station, whereupon such book is movedto `a second work station for the drilling of the remaining openings ina second operation, a second book being moved to the rst work station sothat the iirst openings are drilled therethrough rwhile the remainingopenings are being drilled simultaneously at the second work station,withtheresult that each operation of the machine discharges a completelydrilled book ready for the coil binding operation. i

A further object is to provide. novel means for advancing the bookssuccessively L,to the work stations, positioning` the books 4at suchstations, clamping the books in [position and then performing thedrilling operations simultaneously at the two stations.`

Other objects and `advantages of the invention will become apparentduring the course of the following de- 3,404,587 Patented Oct. 8, 1968ice - scription. In the drawings I have shown one embodiment of theinvention. In this showing:

FIGURE l is a front elevation of the apparatus;

FIGURE 2 is an enlarged vertical sectional View on line 2-2 of FIGURE 1;

FIGURE 3 is a section taken substantially on line 3-3 of FIGURE 2;

FIGURE 4 is a similar view taken substantially on line 4-4 of FIGURE 2;Y

FIGURE 5 is an enlarged fragmentary elevation of the left-hand unit asviewed in FIGURE 3, comprising the first work station of the apparatus;

FIGURE 6 lis an enlarged section view on line 6 6 of FIGURE 5;

FIGURE 7 is an elevation similar to FIGURE 5 shOW ing the book clamp inoperation with the drills in operative position;

FIGURE 8 is an enlarged sectional view on line 8-8 of FIGURE 7;

FIGURE 9 is a perspective view of one of the supports, and

FIGURE 10 is a section on line 10--10 of FIGURE 2.

Referring to the drawings, the numeral 10 designates the frame of theapparatus as a whole comprising vertical leg members 11 and a pluralityof horizontal cross members 12. A longitudinally extending, angularlyarranged support 14 extends along the machine and is supported by thefront leg members 11 and a similar upper plate 15 is secured to the tophorizontal frame members 16. Fixed, respectively, against thelongitudinal members 14 and 15 are elongated plates 17 and 18, as shownin FIGURE 2, the members 17 being clearly yshown in FIG- URES 6 and 8.

Two pairs of spaced supports indicated as a whole, respectively, by thenumerals 20 and 21 are connected to the longitudinal member 17, as shownin FIGURE 8. To this end, the open forward end of each such body isprovided with a cast angle bolted as at 24 to the member 17. Each body20 and 21 is bolted at its other end as at 25 to supports 26 carried bythe frame members 12.

The supports of each pair 20 and 21 are further provided with cast pads(FIGURE 2), and to the pads of each pair of supports 20 and 21 asupporting body 31 is bolted as at 31. Thus, tWo of the supportingbodies 31 are provided as shown in FIGURE 3. The upper face of each body31 is provided with a dovetail slot 32 (FIGURES 9 and 10) in which isslidable a dovetail 34 carried by a motor support 35 on which is bol-teda motor 36 as at 37. Thus, each motor 36 and associated elements areslidable upwardly and to the left in FIGURE 2.

A main drive shaft 38 is suitably supported in bearings (not shown)mounted on the yframe members 12 and is constantly rotated from anysuitable power source (not shown). This drive shaft is provided with apair of cams 40 (FIGURES 2 and 3), each having an arcuate high portion`41 each engaging a roller 412 carried by one of the dovetails 34. Eachcam 40 is further provided with an arcuate low portion `42, and it willbe apparent that the high portion 41 moves ythe motors and partsconnected thereto upwardly and to :the left in FIGURE 2.

The shaft 38 is 'further provided with a plurality of cams 45 havinghigh and low portions 46 and 46', respectively, engageable with rollers47 carried by levers 48 (FIGURE 2) pivotally supported by the frame ofthe apparatus as at 48. The `free end yof each lever 48 engages thelower end of a rod 49. Two of the rods 49 are slidable in each of thesupports 20, and each carries a disk S0 engaging the lower end of aspring I51 (FIG- URES 2 and 4).

A plurality of plates 56 and 57 extend longitudinally of the apparatus(FIGURE 2) and are suitably secured to end 'frame members thereof, andthe plate 56 seats on the longitudinal member 17 and engages the upperend of each of the springs 51. Each rod 49 extends slidably through theplate 56 and carries at its upper end a clamping member 58, having adownwardly and inwardly turned portion 59 terminating in a liange 60adapted to engage a 'book in a manner to `be described and providedwi-th a plurality of bushings 61 (FIGURES 6 and 8) further describedbelow. The plate 56 has bushings 62 lmounted therein `in alignment withthe bushings 61 for purposes to be described.

The upper end of each 'dovetail 34 has iixed theretf.) a gear` housing65 in each of which is'lmounted a shaft 66 carrying a plurality of wormwheels 67. Each gear housing slides with its associated dovetail 34. Oneend of each shaft 66 externally of the gear housing 65 is provided witha pulley' 68. A belt 69 passes around this pulley and around a pulley 70on the drive shaft of the associated motor 36.

Each gear housing 65 rotatably supports a plurality of spindles 75, eachgear housing being provided with bearings 76 for this purpose. Each ofthe spindles carries a worm 77 meshing with one of the worm wheels 67 tobe rotated thereby. Each spindle 75 carries a suitable chuck 78 of anydesired type, in which is mounted the lower end of a drill 79. Eachdrill is in alignment with a pair of bushings 61 and 62. The drills areshown in retracted positions in FIGURES 3, and `6 and are shown inoperative positions in FIGURES 7 and 8.

Above the plate 56 is arranged a plate 80 (FIGURES 1 and 2) slotted asat 81 `for the passage therethrough of a pair of pushers 82. Each pusher82 is pivoted as at 82 (FIGURES 5 and 7) to an angle iron `83, one angeof each of which is movable in the groove of a plurality of rollers 84,the angle irons being tied together as at 85 (FIGURE 2). Each finger 82has its movement limited by a stop 83 and is counterweighted as at 84 tobe biased to the position shown in FIGURE 5. One of the connectingmembers 85 is connected to one end of a link 87, the other end of which(FIGURE l) is connected to one end of a lever 88 pivotally supported atits other end as at 89. A connecting rod 90 is pivotally connected atone end as at 91 to the lever 88 and at its other end as at 92 to awheel 93. This wheel is carried by a shaft 94 extending transversely ofthe machine and having a beveled gear 95 meshing with a similar gear 96carried by the :main drive shaft 38.

Thus, the angle irons 83 and pushers 82 are reciprocated once duringeach revolution of the wheel 93. Pairs of these pushers are shown inFIGURE l. The two pairs to the right receive therebetween a Ibook placedmanually on the plate 80 by an operator, the lower edge of the bookbeing slidably supported by a flanged guide 98. The book thus placed inposition will be moved at the proper time to the same position or workstation now `occupied in FIGURE 1 by the two left-hand pairs of pushers82, a book between the latter pairs of pushers later being moved therebyto a second work station. These two work stations are generallyindicated in FIGURE l by the numerals 99y and 100.

Above the clamp 58 is arranged a longitudinal bar 102 having guides 103receiving a rack Abar 104. Adjacent one end and intermediate the ends ofthe member 102 are mounted shafts 106 about which is rotatable one endof a finger 107 biased by a spring 108 (FIGURE 2) to turncounterclockwise as viewed in FIGURE 3. An arm 109 is fixed to each`shaft 106 and projects across the adjacent finger 107 to positivelyturn it in a clock-wise direction in FIGURES 3 and 7 under conditions tobe described. A stop 110 having an adjusting screw 111 is arranged tostop counterclockwise turning movement of the fingers 107 at the properposition. Each shaft 106 carries a pinion 114 (FIGURE 2) meshing with asecond pinion 115 (FIGURES 3, 5 and 7), and the pinions 115 mesh withthe rack 104.

The member 102 also is provided with `two longitudinal slots 118 eachslidignly supporting a crosshea'd'r119 in which is mounted a shaft 120similar to the shaft 106. Each shaft 120 carries an assembly includinglingers corresponding to the -nger 107 and the finger 109, and thelatter finger, as shown in FIGURES 3, 5 and 7, ,comprises an. arm 122having a plate 123 thereon spring. pressed as at 124 to engage theleadingedge ofta booktarranged between the fingers 107 and122. '1, f Y

4Each shaft 120 carries a pinion 125 directly meshing with the teeth ofthe rack 104. It will be apparent that the pinions y115 reverse rotationof the arms 107 relative to the arms 122 when the rack 104 is movedineither direction. The member 102 (FIGURE 2) is supported lby `brackets130, and the assembly of elements just described is protected by a cover131 shown only in FIGURE 2.

Referring to FIGURE 3, a shaft-135 is journaled in the member 102adjacent one end thereof and carries a pinion 136 meshing with the rack104. An arm 137, carried by the shaft 135, has its free end pivoted to apush rod 138, the lower end of which is provided with a band 139 inwhich rotates a cam -140 carried by the shaft 38. Rotation of the cam140 rocks the arm 137 from the position shown in FIGURE 3 to a lowerposition to swing the fingers 107 and 122 to the operative positions`shown in FIGURE 5.

Operation Wit-h the apparatus running, an operator places a book in theproper position in front of the rst pair of pushers 82 at the rig-hthand end `of the machine (FIGURE 1) with the edge of the book in whichthe openings are to be drilled at the lower or forward end thereof asviewed in FIGURE 6. The operation of the wheel 93 (FIGURE l) moves theset of pushers referred to to the left, as viewed in FIGURE l and,propelled by the first pair of pushers 82 at the right hand end of theymachine the book will move tothe left in FIGURE l. The lever 88 thenretracts and the angle iro-ns 83 and the second pair of pushers from theright will escape beneath the book and return to the position shown inFIGURE l ready for engagement with the adjacent edge of the previouslyfed book.

The book previously fed to the machine will be engaged bythe second pairof pushers 82 from the right in FIG- URE l to be moved to the first workstation 99 whereupon the third pair of pushers 82 from the right willswin-g downwardly to escape beneath the book. After an operation isperformed on the first book at the iirst work station 99, as describedbelow, the retraction of the angle irons 83 `will cause the third pairof pushers-82 from-the right to engage the leading book to Iadvance itto the second work station 100. This operation is repeated so long asthe apparatus is running and is fed with books, the books with drilledopenings being pushed to the left in FIGURE 1 from the second workstation 100.

Each book is pushed to one of the work stations in the manner describedand will be placed in approximately the correct position at eachstation. When such positions of the books are reached, the cam 140operates the push rod 138 to rock the pinion 136 in a clockwisedirection in FIGURE 3 to rotate the shafts 120 clockwise and the shafts106 counterclockwise through the idler'gears 115. Under such conditionsthe fingers 107 and 122 will swing to the operative positions shown inFIGUREv 5 and'movement of each finger 107 will be limited by its stop111, the arm 109, if necessary, swinging slightly beyond its point ofengagement with the adjacent edge of the arm"107. Each stop 111positively accurately positions-the ltrailing edge of the book at eachwork station. Each arm 122'will swing downwardly to engage' the plate123 with the leading edge of the book, such plate being able to ygive tothe'fright in FIGURE 5 if necessary by virtue of its spring mount:- rng.

After a book is in position for the drilling operatibiis, the drills 79,normally inoperative, as shown' in FIGURES 5 and 6, will bemoved'upwardly tb perform theldrill'iiig Uponthe completion of thedrilling operations, the cams operations. These drills twill be`constantly rotated -byithe worm gearing/,67, 77,; At the propentime, thecamsAS will release the'. leversAS .fromtherlowen ends ofithe `rods 49,whereupon the springs 51 will move the clamp.=.5.8 downwardlytintoengagement with thee book `ateach` station to tirmly.fl1old the-book inpositionuThelcams 40 and 45 `have theirghigh and low pointssubstantially op positie each other, so it,will be-,apparent lthat thereleasing of the clamp 58 will be followed by the moving ofthe motors 36and associated elements -,to advance-the drills from the positions`shown iniFIGURE 6to the position shown in, FIGUR-E 8, and accordingly,rope nin=gs.:\.1vill ibe drilled throngh the book at each station. f

40-and 45 will continue to rotate, the clamp 58 being lifted, and themotors 36 and'drills, 79 being retracted to their normal positions shownin FIGURE 6.

Uponl completion of the drilling operations, reversal of the movement ofthe rack 104 will swing the fingers 107 and,1 22to releasejtheends ofthe books, and the continued operation of the -tingers l82 will advanceeach drilled book to the left of its position in FIGURE l and willsupply a following book to the rst work station 99.

In the punching of thinner books, it is possible to arrange the punchessufficiently close together to simultaneously punch all` of the openingsto receive the coil binder. Where a thicker book is to beso made, it isnecessary to divide the book into two or more packs, with each partialpack separatelyv punched, whereupon the previously separated parts ofthe book must be reassembled andthis work is usually not `whollyaccurately Vdone with the result that holes punched in separatedsections` of the book are not exactly in alignment. The presentapparatus provides for the making of the holes through thicker` bookswithout the necessity of having to separate them in parts.

' Since the present construction involves elements not present inpunchers, for example, the drills, drill mount-` ings and drivegearstherefor, it is impossible to arrange the centersa distancelapartequalltothe distance between tbeV openings in'the finished book.Therefore, the drills of each set arearranged aparta distance equal totwice the distance ofthe openings desired in the :finished book. Uponthe'completion of the first drilling operation at the work station 99,the .book is advanced to the second work station 100, at which point thepositioning lfingers 107. and 122"associated with the second'work stage,that is, the right Ahand stage in FIGURE 3, will position the bookaccurately lso 'that the drills will be aligned centrally of the spacesbetween the previously drilled openings. At the completion of theseco-nd stage of operation, therefore, the entire book thickness Will beprovided =with openings spaced apart the proper distance to receive thespiral binden "i The combination of elements issuch that it materiallyspeeds upthe operation of drilling the openings. The end result is thatonce the leading book has been drilled at the second work station100,'eaclisucceeding operation of the apparatus turns out *a' completelydrilled book. In other words, while the iinal drilling operation isbeing performed at the second work station 100, the first drillingoperation is being simultaneously performed on a following book at thefirst Work station 99. As stated, therefore, once the machine is inoperation, each complete cycle of operation turns outandfee'ds' from theleft hand side of -the apparatusin 'FIGURE la completely drilled bookready lfor the spinningoflthe coil therein.

` 'iThusl the present machine permitsl the rapid formation ofopeningsthropgh relatively books which cannot be done withipunches dueto the inability of the latterto punch through more than-.armihimnrnthickness of sheets. The present apparatus can perform its functionsthrough relatively thick books and at the same time tur-n out a bookready for the coil binder upon each complete cycle of operation thereof.Conventionally, where thicker books areiturnednoutr'by the punchingmethod,A two or more punc'hingioperations are. required," depending upon)the thicknessof thzbook fand the1-separated..parts anustgbereassembled: Thisigreatly'slows'down the-rate of Yproduction asdistinguished from the present apparatus as stated above. Y I

While two `work stations and associated parts have been illustrated, it`will be apparent that more than twosuch stations lmay be employed. Inany cas'e, theopenings `in the finished books will be arranged in apredetermined distance apart and `the drills ateach work station will bespaced .apart a multiple .of said'predeterrnined distance, whichmultiple is equal to the vnumberV of' sets of drills. Thus, if twov setsof drills are` employed, the multiple will be 2, the drills of each setbeing spaced twice said predetermined distan-ce. If three sets of drillsare employed, the multiple will be 3 corresponding to the number of setsof drills. The drills of each set will be so positioned that when thefinal drilling operation is completed, all of the book openings will bespaced apart the predetermined distance referred to.

It is to be understood that the form of the invention herewith shown anddescribed is to be taken as a preferred example 4of the same and thevarious changes may be made as donot depart from the spiritof theinvention and the scope of the appended claims.

I claim:

1. An apparatus for forming bookbinding coil receiving openings in booksnear one edge thereof and spaced a predetermined distance apart,comprising a plurality of spaced sets of aligned drills each comprisinga work station, the drills of each set being spaced apart a distancewhich is a multiple of said predeterminedrdistance corresponding to thenumber of said sets of drills, means for advancing books step-by-step tosuccessive work stations, means for positioning a book at each workstation as it reaches such station, comprising elements at each workstation normally out of the path of travel of books being moved to andbetween said stations, and means operative after a book `reaches eachstation for moving said elements into engagement with opposite edgeportions of the adjacent book to position it accurately relative to thedrills of the associated station, and means for moving all of saiddrills simultaneously to drill openings at all of said stations, thedrills of each station being so positioned that at the final station,all of the openings will be drilled and all will be spaced saidpredetermined distance.

' 2. An apparatus, for forming bookbinding coil receive ing openings inbooks near one edge thereof and spaced a predetermined distance apart,comprising a plurality of spaced sets of aligned drills each comprisinga work station, the drills of each settbeing spacedl apart a distancewhich is a multiple of said predetermined distance corresponding to thenumber of said sets of drills, means for advancing books step-by-step tosuccessive work stations, means for positioning a book at each Workstation as it reaches such station, comprising elements at each workstation normally out of the path `of travel of books being moved to andbetween said stations, means operative after a book reaches each stationfor moving said elements into engagement with opposite edge portions ofthe adjacent book to position it accurately relative to the drills ofthe associated station, and means operative after said elements haveengaged opposite edge portions of each book for clamping each book intoposition prior to movement of said drills to drill said openings, andmeans for moving all of said drills simultaneously to drill openings atall of said stations, the drills of each'station being so positionedthat at the final station, all of the openings will be drilled and allwill be spaced said predetermined distance.

3. An apparatus for forming bookbinding coil receiving openings in booksnear one edge thereof and spaced apart a predetermined distance,comprising a pair of spaced sets of aligned drills respectivelycomprising a first and second work station, the drills of each set beingspaced apart a distance twice said predetermined distance, means 'forsupporting books for movement through said work stations, comprising aplate slotted longitudinally of the direction of movement of the books,said advancing means comprising fingers projecting through said slots toengage the books, and means for reciprocating said fingerslongitudinally of the slots of said plate, meansengaging successivebooks placed on said supporting means ahead of said first'work stationfor moving the books successively to said work stations, positioningmeans comprising elements parallel to the line of movement of booksalong said supporting means for positioning the books at each workstation, means for engaging said elements with opposite edge portions ofeach book for positioning the books relative to the drills of each set,means operative after said elements have engaged each book for clampingsuch `book against said supporting means, and means for moving all ofsaid drills simultaneously to drill openings in books at both of saidstations, the drills of said second station being positioned to drillopenings equidistantly from openings previously drilled at said firststation whereby all of the openings after operation of the drills ofsaid second station will be spaced said predetermined distance.

4. An apparatus for forming bookbinding coil receiving openings in booksnear one edge thereof and spaced apart a predetermined distance,comprising a pair of spaced sets of aligned drills respectivelycomprising a first and second work station, the drills of each set beingspaced apart a distance twice said predetermined distance, means forsupporting books for movement through said work stations, means engagingsuccessive books placed on said supporting means ahead of said firstwork station for moving the books successively to said work stations,positioning means comprising elements parallel to the line of movementof books along said supporting means for positioning the books at eachwork station, means for engaging said elements with opposite edgeportions of each book for positioning the books relative to the drillsof each set, means operative after said elements have engaged each bookfor clamping such book against said supporting means, and means formoving all of said drills simultaneously to drill openings in books atboth of said stations, the drills of said second station beingpositioned to drill openings equidistantly from openings previouslydrilled at said first station whereby all of the openings afteroperation of the drills of said second station will be spaced saidpredetermined distance, said elements of said 8 positioning meanscomprising vpivoted fingers arranged'at each station and normallypositioned out of 'the pathof travel of the books, and meanssynchronizing movement of said reciprocating means and said fingers forswinging said fingers into engagement with the books vat th'e respectivestations after a book reaches each work station;

5. An apparatus for forming bookbinding coil receiving openings inybooks near one edge thereof and spaced apart a predetermined distance,comprising a pair of spaced sets of aligned drills respectivelycomprising a first and second work station, the drills of each set'beingspaced apart a distance twice said predetermined distance, means forsupporting books for movement through said work stations, means engagingsuccessive books placed on said supporting means ahead of said firstwork station for moving the books successively to said work stations,posi.- tioning means comprising elements parallel to the line ofmovement of books along said supporting means for positioning thebooks'at each work station, means for engaging said elements withopposite edge portions of each book for positioning the books relativeto the drills of each set, means operative after said elements haveengaged each book for clamping such book against said supporting means,means for moving all of said drills simultaneously to drill openings inbooks at both of said stations, the drills of said second station beingpositioned to drill openings equidistantly from openings previouslydrilled at said first station whereby all of the openings afteroperation of the drills of said second station will be spaced saidpredetermined distances, a power driven cam shaft, and two sets of camscarried by said cam shaft, one of said sets of cams being connected tosaid clamping means to actuate it, the cams of the other set beingconnected to move said drills to drill the books after said clampingmeans has been rendered operative by said first named set of cams.

References Cited UNITED STATES PATENTS 2,285,911 6/ 1942 DeHart 77-22 XR3,093,416 6/1963 Schmidt 77-64 XR FOREIGN PATENTS 361,708 6/1962Switzerland.

FRANCIS S. HUSAR, Primary Examiner.

